G44.011

Billable
ChapterG00–G99
Ranksubcategory
Official Description

Episodic cluster headache, intractable

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Billable/specific code (valid for reimbursement).
  • •Chapter 6: Diseases of the Nervous System (G00-G99).
General instructions are available for the parent sections:
View CH6 NotesView G44 Notes

Clinical Hierarchy

CH6Diseases of the nervous system (G00-G99)
G40-G47Episodic and paroxysmal disorders (G40-G47)
G44Other headache syndromes
G44.0Cluster headaches and other trigeminal autonomic cephalgias (TAC)
G44.01Episodic cluster headache
G44.011Episodic cluster headache, intractable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to G44.011:

categoryG44
Other headache syndromes
View context instructions
chapterCH6
Diseases of the nervous system (G00-G99)
View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to G44.011. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

1 raw paths
Headache1 unique routes
cluster
episodic
intractable→G44.011

MS-DRG Classification

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

DRG 102
Headaches with MCC
DRG 103
Headaches without MCC

Cross Reference

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